An investigation into the relationships between antioxidant activity and chemical elements as well as polyphenolics in fungal fruiting bodies growing on Betula L.

Otrzymano:
Luty 07, 2017

Zaakceptowano:
Czerwiec 24, 2018

Opublikowano online:
2018-10-27

Autorzy:

DOI: 10.5601/jelem.2018.23.2.1412

Abstrakt:

The kingdom of fungi is a numerous group of organisms with differences in their structure, coloration, nutrition, proliferation, and concentrations of chemical compounds. Discussed in this paper are the results of studies on antioxidant properties, total polyphenolics, percentage of elements in water extracts of six fungal species found on birch (Betula sp.): Inonotus obliquus, Fomes fomentarius, Piptoporus betulinus, Trametes versicolor, Pycnoporus cinnabarinus and Daedaleopsis confragosa. The data are analyzed with respect to their mutual correlations and relationships. The paper contains the results of determinations of total polyphenolics and antioxidant capacity achieved with methods based on DPPH and ABTS, and of the content of elements in extracts of fruiting bodies of six fungal species which occur on Betula L. The total content of polyphenolics (in terms of caffeic acid) in the test samples was between 0.24 % for Daedaleopsis confragosa to 4.04 % for Inonotus obliquus. On the other hand, IC50 found by the methods based on DPPH was from 114 for Daedaleopsis confragosa to 1.80 mg ml-1 for Inonotus obliquus, whereas IC50 found by the methods based on ABTS was between 107 for Daedaleopsis confragosa and 3.37 mg ml-1 for Inonotus obliquus. The Spearman rank correlation test for the results showed a linear relationship between the total content of polyphenolics and the parameters IC50 and the presence of such elements as sulfur, copper and potassium. The value of IC50 was correlated with the content of potassium, rubidium, and sulfur. Data clustering showed that the total content of polyphenolics was the closest to rubidium and potassium, followed by manganese. The value of IC50 was close to those of sulfur and sulfur, and then to the aluminum and iron.